片上网络跨时钟域的高速数据通信接口设计

为了解决跨时钟域问题对基于片上网络的高速数据传输造成的功能误差,提出了一种新的片上网络跨时钟域高速数据通信接口电路.针对采用多电压频率岛分配方案的异步片上网络,将多路选择器模块和基于令牌环的环形异步FIFO相结合构成跨时钟域高速数据通信接口电路.实验结果表明,该算法及电路设计能够有效减小亚稳态的影响,增加片上网络系统数据传输的吞吐率,满足用于视频采集和处理系统的片上网络对大数据量和高速度数据码流进行实时传输的需求.

Network-on-chip Cross Clock Communication Interface Design for High-speed Data

In order to solve the function error in the cross clock domain transmission of high-speed data in NoC,a NoC cross clock domain processing circuit structure is presented.For synchronous NoC with multiple voltage frequency islands,multiplexers and asynchronous circular FIFOs are combined to constitute the NoC cross clock domain processing circuit.The experiment results show that the algorithm and the circuit design can effectively reduce the influence of metastable state phenomenon,increase the NoC data transmission through-put,and satisfy the requirement of real-time transmission of high-speed data in NoC used for video acquisition and processing.